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https://github.com/rust-lang/rust
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fb6fbf02a6
When things like our internal hashing or representations change, it is inappropriate for these tests to suddenly fail for no reason. The chance of error is reduced if we instead pattern-match.
56 lines
1.6 KiB
Rust
56 lines
1.6 KiB
Rust
//@ compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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// Below, these constants are defined as enum variants that by itself would
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// have a lower alignment than the enum type. Ensure that we mark them
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// correctly with the higher alignment of the enum.
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// CHECK: @STATIC = {{.*}}, align 4
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// This checks the constants from inline_enum_const
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// CHECK: @alloc_[[INLINE_ENUM_HASH:[a-f0-9]{32}]] = {{.*}}, align 2
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// This checks the constants from {low,high}_align_const, they share the same
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// constant, but the alignment differs, so the higher one should be used
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// CHECK: [[LOW_HIGH:@alloc_[a-f0-9]{32}]] = {{.*}}, align 4
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#[derive(Copy, Clone)]
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// repr(i16) is required for the {low,high}_align_const test
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#[repr(i16)]
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pub enum E<A, B> {
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A(A),
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B(B),
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}
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#[no_mangle]
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pub static STATIC: E<i16, i32> = E::A(0);
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// CHECK-LABEL: @static_enum_const
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#[no_mangle]
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pub fn static_enum_const() -> E<i16, i32> {
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STATIC
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}
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// CHECK-LABEL: @inline_enum_const
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#[no_mangle]
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pub fn inline_enum_const() -> E<i8, i16> {
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*&E::A(0)
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}
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// CHECK-LABEL: @low_align_const
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#[no_mangle]
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pub fn low_align_const() -> E<i16, [i16; 3]> {
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// Check that low_align_const and high_align_const use the same constant
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// CHECK: memcpy.{{.+}}(ptr align 2 %_0, ptr align 2 {{.*}}[[LOW_HIGH]]{{.*}}, i{{(32|64)}} 8, i1 false)
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*&E::A(0)
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}
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// CHECK-LABEL: @high_align_const
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#[no_mangle]
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pub fn high_align_const() -> E<i16, i32> {
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// Check that low_align_const and high_align_const use the same constant
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// CHECK: memcpy.{{.+}}(ptr align 4 %_0, ptr align 4 {{.*}}[[LOW_HIGH]]{{.*}}, i{{(32|64)}} 8, i1 false)
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*&E::A(0)
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}
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